I did. I don't expect it to 'do anything', although this makes it possible to get a more accurate reckoning of numbers. I think it's quite interesting to see the breakdown stats, however. I mean, who knew there were so many atheists in Brazil?

Do you think many atheists are fearful about revealing their lack of belief?

P.S. A tactic of some religionists is to point out that atheism is a religion. I think this is not strictly valid for atheists who simply do not believe (negative)—as opposed to atheists who contend that no god exists (positive). The former are likely to reconsider if evidence arises, and are thus open-minded empiricists who are not reliant on some sort of faith.

There is a person in jail in Indonesia right now for stating that "there is no god" on his facebook page. And here's an article talking about countries where nonbelief in god is punishable to varying degrees.

(my 2 cents: as is often the case, the Islamic countries are the least tolerant)

You also have to have the right flavour of belief in some countries. In Iran, a man is on death row for converting to Christianity from Islam.

I do believe that many people are afraid to state their non-belief due to a fear of repercussions. The first thing that comes to mind is politicians. My guess is that there are some who do not reveal their non-belief so as to not incur the wrath of the fervently religious.